Transcript Slide 1

ENGG1015 Tutorial
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Pro-Project Laboratory and Project
15 Oct (Supplementary notes, may be obsolete,
NOT for examination)
Learning Objectives
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Identify components that can be used in the pre-project
labs and project (i.e. Build a Rube Goldberg Machine)
Identify electrical safety rules, electrical units, electrical
symbols rules
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Electrical Safety
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5-10 ma can cause death
Skin resistance can range from 1kΩ for wet
skin to 500kΩ for dry skin.
Death can result from as low as 50 volts
Body can sense 9 volts under the right
conditions
Report TA or technician for any emergency
case
Electrical Units
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Voltage (V): volts (μv → kv)
Current (I): amperes (amps), milliampere (ma
10-3)
Resistance (R): ohms Ω, k-ohms (k 103), meg
ohms (m 106)
Capacitance (C): farad, microfarad (µf 10-6),
nanofarad (nf 10-9), picofarad (pf 10-12)
Inductance (H): henry, millihenry, microhenry
Frequency (freq.): mhz, ghz 109
Electrical Symbols
AC source
contact
relay
speaker
lamp
buzzer
bell
battery
resistor
ground
DC source
Knowledge for the Pre-Project Lab
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From circuit diagram to implementation
Knowledge for the Pre-Project Lab
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From circuit diagram
to implementation
Knowledge for the Pre-Project Lab
Wire color scheme (red (DC),
black (GND), yellow, blue, green)
Terminal
Board
Sensor /
Switch
Wire to power
supply
Motor /
Driver
SS relay
Digital Multi-meter (DMM)
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Important debugging tool
Voltage DC: 2mv-1000v
Voltage AC: 2vac-750vac
Current: 2ua-10A
Resistance: 2-2m
BJT: beta test
Diode test